Lathe



March 26, 1929.y y MRE@ 1,106,544

LATHE v original Filed oct. 2o. 1919 e Smets-'sheet 1 March 26, 1929.

M. REID LATHE 6 Sheetsl-Sheet 2 March 26,1929. M REl-D '1,706,544

' LATHE y Original Filed Oct. 20. 1919 6 Sheets-Sheet 3 March 26, 1929.Y M, REID 1,706,544`

LATHE i Original Filed Oct. 20. 1919 6 Sheets-Sheet 4 M. REID Ma'r'ch2a, 1929.

LATHE -6 Sheets-Sheet 5 Original Filed Oct. 20. 1919 i4 /ff f/f na? M.REID Mardi 26, 1929,

LATHE 6 Sheets-Sheet 6 Original Filed Ooi. 20' 1919 Patented Mai'. 26,1929.

unirse l STATES i MARCELLUS Rainer CLEVELAND, OHIO.

LATI-IE.

Application filed. October 20,1319, Serial No. 332,109. Renewed December24, 1927.

This invention relates to machines such as lathes and is directed moreparticularly to the carriage feed and stop mechanism therefor.v f

The priinary object of the 'present invention is to provide aparticularly accurate stop mechanism fora lathe carriagevwhicli shallserve to automatically stop the carriage feedinechanisin at aLpredetermined point in either directionof travel of the carriage.

Another object is to provide a carriage feed niechanisin,ofthe aforesaidcharacter' which shall be siinple in construction, accurate and reliablein operation' and which inay be easily adjusted. f

A still further object is toprovide means for varying the speed oftravel of the carriage which inay be easily' and quickly adjusted, andalso to provide ineans for inanually operating the carriage. Y

lllfith these and other objects in view the inventionconsists in thevarious novel feaLrv tures of constructionv and arrangement orcombination, all of which will be fully described hereinafter andappended claiins.

ln the drawings accompanying and forni'- ing part ofthis application,Fig. 1 is a side elevation of a lathe showing iny iin'proved carriageinechanisin applied thereto; Fig..r 2 is a top plan View ofthe inachi'neshown in Fig. 1 but showingfthe gear covers removed frein certain of thegearing inechanisiii; Fig. 8 is a vert-ical sectional viewtalren on theline 3-3 of l4`ig.,2; Figp4 is a-detail verticalr sectional viewtalen onthe line 4444 of F 1;

Fig. 5 is a sectional view of the carriage taken on the line 5 5V ofFig. 4; Fig. 6 is a.hori-,

Zontal sectional view through thecarriage taken on the linee-6 of Fig.4; Fig. 7 is a detail sectional view of the inicroineter stopVattachment taken on the line 7-7 ofFig. 1; 8 is a horizontal sectionalviewl ofthe micrometer stop attach inenttalren on 'the line 8-8 of Fig.9. .is asectional View of the gear feed inechanisinfor.driving thecarriage v`feed inecha'nisin; and Fig. 1() is a detail assembly of thereversing' rocker arin and the reversing gear, taken' on the line10i-1() fpgyg i i I Describing pointed out in i the` numerals, 1indicates the inain casting or body'of the lathe which is supported bysuitl :able legs v2, and an oilv pan 8 provided with an'integral oilreservoir 4 is disposed be- 55 neath the body of the lathe. A spindle'5, car" rying a spindle driving gear 6, is Vjournaled in suitable.bearings 7-f-7 in At-he body of the lathe, and journaled in suitablebearings 8 8 and parallel tothe spindle, is a friction clutch shaft 9.This shaft carries a spindle driving pinion 11, which ineshos with gear6, and also carries two friction clutchgears 12 and 13', on

either side of a `friction drive clutch '14. A countersha'ft 1G, whichis journaled in suitablebearings 17.-17 and disposed parallel to thefriction drive shaft, carries the gears 18 and 19, whichare'perinanently nieshed with the gears 12 and 13, respectively. Theratio of the gears 12, 13, 18 and 19 is preferably such that when theshaft A16 is rotated the spindle is driven at either of two speeds, oneabout 50% greater than the other, by throwing the clutch to vengagegears 12 and 18 or to engage gears 13 and 19. 1 The' countershaft 16isrotated by a gear 21 mounted on the end thereof, which is operativelyconnected tl'irou'gh gear not shown, to a drivel-shaft 23 4that ifsrotated by a drive pulley 26 to which any suitable source of power niay`be co'n-v 80 nected. Thegear 21 and the gear ineshed therewith arepreferably detachably connected to the shafts 16 and 23, respectively,by any suitable ineans as the nuts 27y threaded on the end of theshafts.. This perinits an interchange of gears to suit the speeddesired.

A detachable coverf28 serves to enclose the gear`21 and the gear nieshedtherewith and is fastened by any suitable ineans not shown. rlhe othergears are siinilarly enclosed and hence need no further explanation.

lfVhere spiral gears'are used, as for the spiral driving` gear 6 and thespindle driv-V ing pinion 11, there is Vprovided a ball thrust bearingtotaire 'up the thrust of these gears, V95 andjsuch bearings are shown at31 and 32 in Figs. 1.1`andf2 i The double friction drive clutch 14 abovereferred to: inay Ibe of lany suitable construction and lis operated byineans of a lever 46 ioe 'which is shifted to the right to connectgear13 with shaft 9, and to the left connect gear 12 with sh aft 9, it beingunderstood that when one gear is connected to shaft 9, the other' gearis automatically disconnected therefrom.

It will be understood that the double friction clutch shaft 9, thecountershaft 16, and the driveshaft 23 are all mounted in a separatecasting 48 as a complete assembly, and this casting 48 is fastened tothe main casting 1 by suitable bolts, not shown, and held in alignmenttherewith by the cooperating surfaces 50-51 and the clutch `shaft 9fitting in bearings 8-8 which are on the main casting 1.

Fre/n ctr-Wiege assembly.

This assembly is shown in detail in Figs. 5

and 6 wherein 60 represents the main casting which is slidable along thefront bed rail 61 and guided by the lower bed rail 62. The top of thecasting is provided with a plurality of dove tailed grooves 63 toreceive the double dove tail cross slides, one of which is shown at 64while the other grooves are protected with cover plates 65 fastened inplace by the screw 66. These plates can be easily removed and crossslides substituted therefor when the work demands a plurality of cuttingtools. A slide block 67, provided with a suitable tool post slot 68, isslidable along the upper dove tail of the double dove tail cross slideby means of a screw 69 threaded into a nut 70 which is fastened to thecross slide by the bolt 71. A ball crank 7 4 fastened to the screw 69serves torotate it and thereby move the cross slide vblocklongitudinally thereof and this movement is limited by the adjustablesto-p screw nuts 7 5-75 threaded on a screw 76. The cross slide screw 69is also provided with a graduated micrometer disk 77 for measuriu themovement of the cross slide block and tool post. The double dove tailcross slide 64 is also slidable along the lower dove tail with respectto the top of the main casting 60, and

. is positioned thereon by the bolt 78 which is lbed by the bolts 8G.

passed through the main cast-ing and threaded into any of a series oftlneadedholes 73, formed in the double dove tail slide (Fig. 4). In this"manner itis possible to provide a solid support for the cross slideblock when small or large objects are turned in the lathe. -T hecarriage is movable along the bed, manually, by a hand wheel 79 which isfastened to a hollow shaft 80 the inner end of which carries aV pinion81, meshing V with the gear 82 which is fastened to a countershaftv83,the inner end of which carries a pinion 84, which meshes with a rack 85fastened to the lathe The carriage islautomatically moved along the bedby the splined feedshaft 88 arranged longitudinally of the bed andjournaled in suitable bearin gs 89-89. Means for rotating the shaft atvariable speeds will be explained later. Referring to Fig. 6, it willAbe seen that asleeve gear 390, slidable along the shaft 88, meshes witha shaft 96 extending through the hollow sleeve S0 and threaded into theclutch member 95. A knob 97 is provided on the outer end of -the shaftfor actuating it, thereby disengaging the clutch. The sleeve gear 90,the shaft 92, and the worm sleeve gear 91 are mounted in a cradle 99provided with a handle 100,(l1`ig. 6) and swingable about the feed shaft88 an axis so that when the cradle is lowered the worm is disengagedfrom the wo-rm gear 93 which stops the carriage.

A micrometer stop attachment is provided consists of a clamping member102 (Figs. 7 and 8) for ,clamping the micrometer bracket lforautomatically dropping the cradle and 1 103 to the lower bed rail 62. Amicrometer spindle 104 carrying the `micrometer index sleeve 105 isthreaded into a sleeve 106 which is clamped to the bracket by the screw107.

The micrometer spindle extends on vboth sides of the bracket so that itmay engage f the carriage when mounted on either side thereof. As shownin Figs. 5 and 6 the bracket is clamped on the lefthand side of thecarriage and when so positioned, the

spindle engages the upper release bar 109 which is slidably mounted inthe carriage and pushes it to the right. This bar is provided with arack portion 110 which engages pinion 111 which meshes also with therack portion 112 in the lower release bar 113. The rele'asf` Y ing bars109 and 113 are held in operative position by a spring 114 which tendsto force them apart, and bar 109`is provided with a slot 115 and a bo-lt116 for limiting the outward movement of the bar and also provided witha notch 117 at the outer end thereof. This notch is adapted to receivethe hardened stud 119 which is mounted in the lever 100 and held againstthe bar 109 byV a spring pressed pin'120 bearing on a flanged projection100L of the lever 100. In operation the carriage moves to the left andbar 109 engages the micrometer spindle 104 which has been setto apreviously determined position, and the bar 109 is forced to theright'which also serves to move the bar 113 to the left through themedium of pinion 111. The stud 119 vdrops into notch 117 by the aid ofthe spring pressed pin 120 and thereby lowers lever 100 which lowers thecradle 99 and dis` engages the worm from the worm gear 93 which stopsthe carriage. It will be readily apparent that if the micrometer stop isplaced on the right hand side of the carriage, and.

the carriage is moving to the right, the bar j f 113 would Vengage themicrometer spindle 104 n `mounted on said carriage, means connectingsaid bars whereby motionof one is transmitted to the other,-a leverengaging one ofA and its motion transmitted to the bar 109 and therebyserve to stop the carriage in the same manner. An emergency stop isprovided by means of a lever 122 which is fastened to the pinion shaft123 and by rotating this lever by hand the releasing bars can becontracted andthe cradle dropped.

From? carriage feed mechanism.'

The gearing for driving the carriage feed shaft 88 is best shown inFigs. 1, 2, 9 and 10.y The spindle 5 is provided at one end with a gear125which meshes with a gear 126 which in turn meshes with a similar'gear 127 and this gear meshes wit-ha larger gear 128. The three gears126, 127 and 128 are journaledon stud shafts mounted on the bracket 130which is swingable about the shaft 131 as an axis so as to engage eitherof gears 126 or 127 with the gear 125, thereby serving to reverse thedirection of rotation of gear 128 and subsequently Shaft 88. The studshaft Carrying gear 128 also mounts a gear 132 which rotatessin'iultaneously therewith and meshes with a gear 133 mounted on acountershaft 134 j ournaled in suitable bearings, in the change gear boX135. The shaft 134 is splined and mounts a slide pinion l136 movable bythe index arm 137 which is ournaled on the shaft 134 and swingablethereabout las an axis. rhe index arm mounts a stud shaft 139 on whichis journaled gear 140 which meshes with pinion 136 and one of thevariable speed gears, 141, 142, 143, rigidly mounted on the feed shaft88. The shaft 131 is journaled in suitable bearings inthe gear boX 135and at one end carries a block 145 slidable in the channel 146 to thebracket 130, and at the other end carries a short lever 147 so that byswinging the lever through 180, it causes a correspondingmovement ofblock 147 and this swings the bracket 13() to vengage `either ofthegears 126 or 127 with gear 125, thereby reversing the carriage aspreviously eX- plained. In order to hold the shaft 131 in a fixedposition, there is provided a boss 149 and a spring pressed pin 150(Fig. 33) adapted lto engage either of two holes not shown in the boss.Y

YHaving thus described my'invention, what I cla-im is z- 1. A stopattachment for a lathe carriage comprising a pair of releasing barsslidably mounted von said carriage, a lever supported by one of saidreleasing bars whereby the carriage feed mechanism is normally held inoperative positionv and means formoving said lever to disengage saidfeed mechanism and stop said carriage.r

2. A stop attachment for a lathe carriage comprising a pair of releasingbars slidably said bars to hold the` carriage feed mechanism inoperative position and an adjustable abutment on the lathe body adaptedto engage either of said releasing bars to move said lever and said feedmechanism to an inoperative position.

3. A stop attachment for a lathe carriage comprising a bar mounted onthe carriage and adaptedV to engage an abutment,- said bar beingslidable in a direction opposite to the movement of said carriage, feedmechanism for moving saidrarriage and bar into engagement with saidabutment, a connection between said feed mechanism and said bar foroperatively vengaging said feed mechanism with said carriage, and meansassociated withvsaid connection for disengaging said feed mechanismfromsaid carriage upon engagement of said bar with said abutment to movesaid bar in aA direction opposite to the direction of travel of saidcarriage.

4. A stop 'attachment for a lathe carriage comprising a pair of membersslidably mounted for movement in opposite directions on the carriage, afeed mechanism normally retained in operative position by a projectionengaging one of said members, and means adapted to contactwith either ofsaid members at a predetermined point to slideone of said members withrespect to the carriage and release Ysaid feedy mechanism.

5. A stop attachment for a lathe carriage comprising a pair of `membersslidably mounted on the carriage, means connecting lsaid members wherebymotion of one is transmitted to the other, a-feed mechanism, meansconnected with said feed mechanism and engaged with one ofsaid membersfor ret-aining said mechanism in operative position, and means adaptedto contact with either of said members at a predetermined point toreleasey said feed mechanism.

6. A stop attachment for a lathe carriage comprising a pair of barsslidably mounted on the carriage, a spring normally urging said barsapart, a connectionV between said bars whereby motion of one istransmitted in an opposite direction to the other, a feed `mechanism forsaid carriage, a projection sok said bars apart, means operativelyrconnecting each of said bars whereby motion of one is transmitted tothe other, a feed mechanism fory said carriage including a cradlemovable aboutv an axis,'a driving element journalled in saidcradle andadapted to engage with a driving elements in operative connection, and

f means adapted to engage With either' of said bars to release saidcradle and break said driving connection. s

8. A stop attachment for a lathe carriage comprising a pair of. barsslidably mounted on the carriage, a spring normally urging said harsapart, a pinion engaged with each of said bars whereby motion ofone baris transmitted to the other har in an opposite direction, a feedmechanism for said car,-v

riage, a projection extending from said feed mechanism and engaged Withone 'of said hars for retaining said mechanism in operative position,means adated to contact With either of said bars to release said feedmechanism, and manually controlled means for rotating said pinionthereby to release said feed mechanism. Y

9. A stop attachment for a lathe carriage comprising a releasing harslidably mounted on said carriage, feed mechanism for operating saidcarriage, an element supported by said releasing bar whereby thecarriage feed mechanism is normally held in operative position to drivesaid (carriage, and means for moving said element vto disengage saidfeed mechanism and stop said carriage.

In testimony whereof, I hereuntol a'HiXmy signature.

MARCELLUS REID.

